Automatic drilling machine



Dec. 13, 1927.

' E. J. KINGSBURY AUTOMATIC DRILLING momma:

4 sheets sheet 1 Filed .Jan. 22. 1921 Dec. 13, 1927.

E. J. KINGSBURY AUTOMATIC DRILLINGYMACHINE Filed Jan. 22. 1921 4 Sheets-Sheet 2 Dec. 13, 1927. v 1,652,247

E. J. KINGSBURY AUTOMATIC DRILLING MACHINE Filed Jan 22. 1921 4 Sheets-Sheet 5 Dec. 13; 1927". 1,652,247

E. J. KINGSBURY AUTOMATIC DRILLING MACHINE Filed Jam-22, 1921 4 she ts-shet 4 Wpw . Figure Patented Dec. 1?), 9 i ,7

UNITED ST T EnwAnnJosnm KINGS-BURY, on, New HAMPSHIRE.

AUTOMATIC DRILLING MACHINE.

' Application filed January 22,1921. Serial no.-;.4a9,1e1.

My invention relates to new and-useful improvements in automatic drilling ma chines.

.An object of the invention is to provide a has a portion thereof harder than another,

as well as prevent the rapid forward movement of the drill spindle when itbreaks through the Work and to provide an automatic means for stopping the feeding of the drill spindle forward and" return it to its normal starting position when the drill has become dull and ,is .not cutting efficiently after drilling a predetermined length of time. v

A still further'object of my invention is to provide a machine of this character which is simple in structure and durable and havmg bination of parts hereinafter more fully described.

In the accompanying drawings- Figure 1 is a side view, partly in section, of my improved drilling machine; 1 Figure 2 is a top plan view of Figure 1, with the drill spindle drive pulley and'its connection removed;

Figure 3 is an enlarged end view of Figure 1, looking from the rear;

view taken on the line L-l-of Figure 1,

' 4 1 in which looking in thedi rection of the arrow,

Figure 5 is a transverse horizontal sectional view taken on the line 1 and looking in the direction of the arrow.

-Referr'ng now to, the drawings, 1 represents the baseof my improved drilling ma chine, which is preferably of cast metal an has at each end upwardly extending standards 2 and 3. The standard 2 is provided at its upper end with a cylindrical bearing the drill spindle 5 is rotatably mounted and is adapted to-move longitudl- Iially. The standard '3 is extended rear-.. provided 'wardly, as: indicated at '6,-and is drill tending arm 10 against rotation,

"13' isa caml l,

a cam-surface15'and against which bears.

certain details of structure and com-- to adjust the lever .18 and bring 0 I u 4'is a. transverse vertical sectional;

5-5 of Figure with a cylindrical bearing 7, iii which the rear end of the drill spindlej'5 is rotatably and longitudinally mounted as will be here- I v The drill spindle 5.is provided with'fa inaftei'. more fully describe pulley 8 over whichv the drive. belt 9' passes and by' means of which the drill spindle is rotated. This pulley," as shown,'is of a flat "elongated form,which allows thefreetlongitudinal movement of: the drill spindle without providin of the belt; aid pulley is of a hollow form and. has secured therein'a'forwardly exwhich' -;remains stationary sleeve .13, in which is rotatably'supported the-shaft 13",- which extends. forward and has its. forward end rotatably mounted in the bearin 11 Bigidly carried by the shaft having at its ,forward end the roller 16 carried bytheinte rmediately pivoted, lever .18. This lever, as shown, is pinote'd at 19 to therearwardextension'l9, carried by the standard;2',.anc l has its upper end pivoted at 22to the block 23 carried by the arm '10.- The block is iadjustablyf-conv nected to the arm 10 by aset screw 24 so as the roller 16 againstfthe cam 14. I I

The sleeve 13, beyond the bearing- 12, is provided is a worm gear 25, meshing with the worm 26 transversely mounted in the base and driven by a pulley 27, over which the belt 28, passes; The beltis continuously driven by the same a. hollow form and has a conical face .29

which formsmne portion of the cone clutch.

The cam 14 has a rearwardly extending d portion'30 and has a cone face 31 which enters the face 29 so that the cam is driven with the worm 25, but allows a slipping action between the same when the ressure of the. roller "16 is not sufficient ,to ock-thesame together, as'will be later more fully described. I

The-lever 18, on'one side of the extension with a worm 24:, for the purpose hereinafter described. Beyond the worm 24K PATENT "OFFICE.

for the transverse movement v as will be fully-understood reference to my. Patent No. 1,379,765,

ing a weight 34, by means of which the lever 18 is normally held forward for,feeding the drill spindle forward and is held against ward position by the spring 38, so as to too rapid forward movement by the enga ement of the roller 16 with the cam 14. T is lever 18 extends some distance beyond the roller 16, as indicated at 35 and is engaged the hooked end 36 of the L-shaped catch This catch is normally held in an upcatch under the end 35 of the lever 18 and thus prevent the forward feed of the drill spindle, as will be hereinafter more fully set forth.

As heretofore described, the sleeve 13. is continuously rotated by the worm 26 meshing with the worm gear25 and when the drill spindle travels forward sufliciently to allow the weight 34 to exert enough pres-' sure on the lever l8 and force the cam 14 and its cone portion into engagement with the cone face of the worm gear 25, there Is a locking action between the cam and the worm which causes a slow rotation ofthe cam. It is not necessarily a positive locking clutch action between the cam and worm gear as there would normally be a slipping act-ion to allow a gradual slow rotation of the cam to permit the feed. of the drill. By this structure, it will be 'seenthat, upon the drill breaking through the work, there will not be a rapid forward movement and thus prevent any injury to the drill.

Mounted in the bearing 35, in the base 1, is a rock shaft 36' which is below the, sleeve 13 but parallel therewith and adapted to oscillate in said bearing. Said shaft 36, beyond the bearing 35, is of a-rectangular form and has slidably mountedthereon the sleeve 37 which is normally held against the collar 39 by. means of a coil'sprin 40,.

as shown in Figure 1 ofthe drawings. his sleeve 37 is provided at one side with an upwardly extending arm 41 which has an inwardly turned end 41 meshing with. the

Worm 24' so that the sleeve is caused to travel on the shaft 36' as the worm. 24 is rotated. The shaft 36', is not only mounted inthe bearing 35' to oscillate, but also has longitudinal movement so that when the sleeve 37 has travelled on the shaft, caused by the engagement of the a m '41,, with the worm, and engages the sho lder 42, the shaft is fnoved longitudinally for the purpose hereinafter described.

The rear end of the shaft 36' is support-edv in the lower end of the lever 43 at 44..

The-lever 43 is yoke shape, as shown in Figure 3, and its upper endv straddles the, standard 2 and ispivoted thereto at 45. Pivoted to the lever 43 at 46 is alink- 47, which extends forward and is pivotally conreturn the roller to the top 50 normally holds or forces the same for-' ward, as shown in Figure 1 of the drawings, so that the upper end extends over the lower end of the latch member 37 and normally holds, the same, as shown in Figure .1.

The shaft 36' has a collar 51 secured thereto, on the inside of the lever 43 and a spring 52 is interposed between the collar and lever, so that there is a yielding pressure exerted on the lever. The shaft 36, beyond the lever, is provided with a weighted collar 53, secured against movement, and having an outwardly extending arm 54 and .a .hooked end 55 extending in thepath of the cam 56,

carried by the shaft 13, so that, upon the rotation of the shaft 13 (later described) the shaft 36' is rocked so as to throw the member 41' eiut of engagement with the worm 24 on the sleeve 13, after the shaft 13"has made one rotation, and the spring 40 will return or. force the sleeve 37 forward ed that the member will be opposite the forward end of the worm. The continued-rotation of the shaft 13 brings a portion of the cam 56 opposite the hooked end 55 of the arm 54 so that the shaft 36' will oscillate by the spring tension to again throw the member into engagement with the worm 24 and the .drill isread for another 0 oration.

When the drih has complete its opera tion, the roller 16 carried by the lever 18, is

at the bottom of the incline 15 of the cam and in orderv to give the necessary power to and with it'the drill, back to its starting point, as well as the weight, ready for another operation, I provide a jawclutch 56. This clutch com rises a collar 57 rigidly carried by the shaft 1y spring-pressed pin 58 adapted to enter of the incline a notch 59 in the end of the sleeve 13, so i that the sleeve and shaft are locked together independent of the friction clutch and as the sleeve is positively rotated, the shaft 13 will be rotated carrying the cam around so that the lever 18 and operated parts are returned to theirhormalgstarting point with the roller on the top of the incline of the cam.

The standard 3 surrounding the shaft 13' is provided with a ring 60 which hgs a cam face adapted to engage the spring-pressed pin 58 and hold it out of the 'notch 59' but, upon the rotation of the shaft 13, to bring the roller 16 in the bottom of the incline 15,

the spring pin 58.is allowed to enter the notch for coupling the shaft 13 and the sleeve '13 together and the cam carried by.the shaft operates the lever 18 to raisethe weight and return the drill to its starting point.

The yoke 43, on opposite sides, is provided with inwardly projectingpins or In s 44' and 45, which are adapted to engage t e shoulder 57' carried by the collar 57, and

105 13 and has a forward-. Y

the same. The rearshaft 36' serves a throwing the catch normally bears against ward movement of the double purpose-first, of

48, and thecontinued rearward movement of,

the shaft causes the .pins 44 and 45" to onf gage'the -shoulderw57lccarried by the collar 57 and moves the same rearwardly, thus causing the shaft 13 to move therewith and cone face or recess the cone clutch to be locked to the continuously cam 14 and'lever 18 the drill spindle 1s car: ried back to the starting point and locked it will revolved independently of the pressure of the roller 16 carried'by the lever after the machine has been operating a predetermined length of time. The operation of the machine is as follows: v

The drill spindle 5 is fed forward by the weight 34, and as the drill works its way through the work, the roller 16 causes a greater pressure upon the cam 14, and the face -thereof frictionally engages the in-the worm 25 and, thus locksor causesa slight rotation of the cam,

J of the worm 26 which so that the cam face is always' in contact with the roller to prevent anyrapid forward movement of the drill spindle. The sleeve 13is continuously rotated by means causes the sleeve 27 to slide longitudinally upon the shaft 36' by means of the arm 41 meshing with the worm 24. When the sleeve strikes against the shoulder 42 of the shaft, the same is moved longitudinally, the operation of which will be hereinafter described.

The continued gradual rotation of the sleeve 13 and the feeding of the drill spindle causes the cam 14 to rotate until the member or collar 57 carried thereby is rotated and the spring pressed latch 58 will slide locked together ting of .the drill,

off of the beveled face of the collar 57 car-1 ried by the; frame and drop into the notch 59 carried by the sleeve, shaft 13 and the sleeve 13 are positively and the cam is rotate move the lever 18 forward, returning the drill spindle to its starting point by the engagement of'the cam with the roller 16. If,

however, the drill is not effectively cuttin J the sleeve 37 'is caused to travel on the sha and engage the shoulder 36' rearwardly and cause the link 47 to tri th'e catch 49, which relea$s the lock whic also engages the lower end of the lever 18 and holds it against rearward movement. If, however, there is no pressure of the roller 16 upon the cam, owing to the rotation of --the sleeve 13- movesthe shaft 36' rearwardly and causes .the yoke 43 to move rearwardly and carrying the shaft 13' causes the com I clutch 25 to rotate the cam drlven sleeve 13, and through the tary drill spindle,

; trolled by the and thus the cam d to the starting point, and

42, force the shaft the lastmentioned the lack of cutand rock the sleeve 37 on the shaft 36, disengaging the arm 31 from the wormv and allowing the spring to return the sleeve to its forward position and after the cam 56 has released the-arm 54, the sleeve returns to its normal position with the arm 41 meshing with the worm readyfor' another operation. Having thus described my invention,'what I claim as new and desire to secure by Letters Patent, is: I

1. A drilling machine comprising a rovyielding means for feeding the drill spindle forward, automatic means for regulating the maximum feed of said drill spindle comprising a cam, a positively driven; member having a friction clutch connection with said cam, and an auxiliary means adapted to disengage said friction clutch after the positively driven member has been rotating a predetermined length of time without the drill working effectively.

' 2. A drilling machine comprising a rotary drill spindle, and a positive clutch connection between the cam and the continuously rotating member adapted to come into operation after the ation and return starting point.

3. A drilling. machine comprising a rotary drill' spindlg, yielding means for feeding the drill spindle forward, a cam the maximum feed of said drill spindle, a continuously driven member having a frictiornclutch connection with the cam and conforward movement of the drill spindle, means for positively locking the cam and the continuously rotating member to.- gether after the drill has completed its operation, and anaiuxiliary means adagtsd to disengage said friction clutch after I continuously driven member has been operating a predetermined length of time for rotating the cam and returning the drill spindle to means operated by means for locking the forward movement.

the drill spindle to its drill spindle against 4. A drilling-machine comprisinga rotary forfeeding the drill spindle, yielding means drill spindle forward, a cam for regulating the maximum feedof said spindle, a continuously driven member having a friction clutch drill has completed its operloo connection with the cam and controlled by 1 the forward movement of .the drill spindle, means for positively' locking the cam and the continuously rotating member together after 105 for regulating.

the drill has completed its operation, and an auxiliary means adapted to disenga e said friction clutch after the continuous driven member'has been operating a predetermined length of time for rotating the cam and returning the drill spindle to the starting point, and a latch tripped by the last mentioned means for engaging the feeding means and locking the forward movement, 5. A drilling machine comprisin a rotary drill spindle against longitudinally movabledrill spin le, yielding means for feeding the drill spindle forward, a cam loosely supported, a continuously driven member having'a friction clutch connection with the cam, an in'termediately pivoted lever having one end connected to the drill spindle at its upper end and its lower end bearing against the cam for regulating the maximum feed of said drill spindle, and automatic means for coupling the cam to the continuously driven member after the drill hasbeen operating a predetermined length of time. I

6. A drilling machine comprising a frame, a rotary longitudinally movable drill spindle mounted therein, yielding means for feeding the drill spindle forward, a cam loosely and rotatably mounted in the-frame, a positively and continuously driven member adjacent the cam, an intermediately' pivoted member carried by the frame and havin one end connected to the drill spindle an its opposite end bearing against the cam, a friction clutch connectionbetween the cam and continuously rotated member and controlled by the pressure of the intermediately'pivoted member on the cam, and automatic means for coupling the cam to the continuously driven member after the drill has been operatinga predetermined length of time.

7. A drilling machine comprising a frame,

a rotary longitudinally movable dr1ll spindle mounted thereon, yielding means for feedin the drill spindle forward, a cam loosely and rotatably mounted in the frame, a positively and continuously driven member adjacent.

the cam, an intermediately ivoted member carried by the frame and aving one end connected to the drill spindle and the 0ppo-- site end bearing a ainst the cam, a friction clutch connection continuously-rotating member and controlled by the pressure of the intermediately pivoted .the drill spindle forward, a rotary. member" mounted in the frame and regulating the hetween the cam and the .a rotary longitudinally m'ova maximum feed of the drill spindle, Ia continuouslydriven member adaptedto drive the rotary member by a fri'ctionclutch, and

a positi've clutch adapted to lock the'rotary member together for. rotatin the rotary its starting point. 'after the drill. as completed its operation.

9. 'A drilling'machine'com grisin afra'me, v a rotary longitudinally .mova

le drill spindle mounted therein, yieldin means for feeding the drill spindle forwar, mounted-in the frame and re maximum .feedof the spindle, ously drivenmember ada ted to drive the rotary member by a friction clutch, auxili ary means adapted to lock'the 'rotarymembar and the continuously rotated. member toating the gether for returning the" drill spindle to its starting point after the .drill has "been; 170-,

,tating a predetermined length of time, and

0 member andv returning the drill s indle 'to I a continuautomatic means for locking the drill at its starting point.

10. A "drilling I machine comprisin a frame, a rotary longitudinallymovable spindle mounted therein,- yielding means for feeding the drill spindle-forward, a rotary j member mounted in said-frame for rein.- lating the maximum-feed of the drill spin e,

a continuously driven m'ember,a friction, clutch connection between the rotary memberv and the continuously rotated member,-

auxiliary means adapted to'lock-the rota member and the; 'ontinuousl. rotated mem .beri-together for returning t e drill spindle to its starting point after; the drill has been" rotating'a predetermined length of time, and

meansoperated by the rotation of said rotary member for lockingcthe drill in its starting. 1

machine j comprising a frame, a rotary longitudinallymovable drill position- 11.-A drilling spindle mounted therein, yielding means for feeding the drill spindle forward, a rotary member mounted inIthe frameand adapted thev drill spindle to itsStartingPOiiIt, a

clutch for locking the .drill spindle inits usf starting position and means operated by the rotary member for releasing the catchwhich locks the sition.

a rotary longitudinall movable drill. spindle 12. Adrillin'g machinecomprising-afiframe,

1.1 to automatically control the maximum ;for-. I ward feed of the drill spindle and to return-- drill spindle in its startingf.po.:;

mounted therein, yiel ing means for feeding the drill spindle forward, automatic means for regulating the feed of the drill spindle, automatic means forjreturning the-drill;

spindle to the startingpoint, and automatic means directly operated by the feed regulating means for locking the drill spindle in' its starting osition.

13. A rilling machine eomprisgggla frame, 1e "spindle mounted in the frame, yielding means for lating themaxmum forward feed, and autofeeding the drill spindle forward, a rotary matic means directly controlled'by the concam for regulating the maximum forward tinned rotation of'the drill spindle "for lockfeed of the drill spindle, a continuously roing it in its starting position after the' drill 'tating member, a friction clutch connecting has rotated a predetermined lengthof time.

the cam and continuously rotating member 16. A drilling machine comprising. a to ether and vcontrolled by the feed of the frame, a rotary longitudinallymovable drill drill spindle, a worm carried by the continuspindle mounted'in the frame, a rotary cam,

.ouslyrotating member, anarm working in an intermediately pivotedarm having one said worm, an auxiliary means for connectend connected to the drill spindle and the ing the cam and the continuously rotating 7 opposite end bearing against thevcam, yieldmemb'er together for returning the drill ing means for moving the upper end of the spindle to its starting point, and means oparm forward for feeding the drill spindle erated by the arm for locking the drill spinforward, a continuously rotating. member, a

dle in its returned starting position. friction clutch connection between the cam 14. A drilling machine comprising a and the continuously rotating member and frame, a rotary longitudinally movable drill controlled by the feed of the drill spindle, a spindle mounted in the frame, yielding positive clutch adapted to lock the cam and means for feeding the drill spindle forward. the continuously rotating member together a rotary cam for regulating the maximum for rotating the cam and returning the drill forward feed of the drill spindle, an interto its starting point after the drill has commediately pivoted arm having one end conpleted its operatioin'a -worm. carried by the v nected to the drill spindle and the opposite continuouslyrotating member, a shaft below end engaging the cam, a continuously rotated the same, a spring pressed sleeve on the shaft, member, a friction clutch controlled by the an arm carried by the sleeve and meshing feed of the drill for connecting the camand with the worm, means operatedby the sleeve the continuously rotated member together, a for releasing a latch for engaging the lower worm carried by the continuously rotating end of the intermediately pivoted vfeed arm member, a longitudinally movable member for locking the drill spindle in it's starting carried by the frame, an arm carried by the position, and means operated by the rotamember and meshing withthe Worm f r tion of the camfor oscillating the sleeve to moving the same, and means operated by the throw the arm out of engagement with the. movement of said member for; releasing a worm for returning itto its'normal forward catch for engaging the lower end of the inposition ready for another operation.

termediately pivoted member for locking it 17 A, drilling machine-comprising a roagainst movement with the drill spindle in tary'drill spindle, yielding means for feed its returned position, and a positive clutch for ing thesaine forward, a continuously rotated locking the cam and the continuously rotatmember, a cam having a yielding friction ing member together for returning the drill clutch member connected with the rotating to the starting point after the drill Spinmember for controlling the said feed of the dle has completed its operation. drill spindle, a positive means for connecting 15. A drilling machine comprising a said controlling cam with said continuously frame, a rotary longiti dinally movable drill rotating member for-returmng saidcam to its spindle mounted in tli means for re lating the maximum forward its starting point. feed 'of the rill slpin I for returning the rill spmdleto thestartv v ing point by the automatic means for regu- EDWARD J OSLIN KINGSBIJRY.

e frame, automatic initial position for returning said spindle to dle, auto matic' means In testimony whereof, afiix my signature; 

